/**
* Read header from bnp file
*/
private function initialize()
{
if ($this->header !== false) {
return;
}
$this->bnp = fopen($this->filename, 'r');
$stats = fstat($this->bnp);
$size = $stats['size'];
$s = new MemStream();
// read last <int> to get position for FAT block
fseek($this->bnp, $size - 4);
$buf = fread($this->bnp, 4);
$s->setBuffer($buf);
$s->serial_uint32($pos);
// now read FAT block
fseek($this->bnp, $pos);
$fat = fread($this->bnp, $size - $pos);
$s->setBuffer($fat);
$s->serial_uint32($nbFiles);
$this->header = array();
for ($i = 0; $i < $nbFiles; $i++) {
$s->serial_byte_string($name);
$s->serial_uint32($size);
$s->serial_uint32($start);
$this->header[$name] = array('size' => $size, 'start' => $start);
}
$this->headerCount = count($this->header);
$this->headerFiles = array_keys($this->header);
$this->headerPosition = 0;
}